Comment 2 for bug 849841

The problem seems to be the foreground and the background
colors (black and white) in the `default' face. But in
the definition of this face in `faces.el', there are no
colors, so I don't know where they come from.

My workaround:

(defface pm/default '((t nil)) "Basic default face.")
(setq mumamo-background-chunk-major 'pm/default)